My users have been getting intermittent exceptions in the grids where we are scolling down to the new records after an add.  I am attaching the error message.  I added the try/catch to the sync to try to stop the unhandled exception error but it didn't seem to work because another user had an error after this code went out.

We are using version 2012.3.1129.40 (can't upgrade to 2013.1.220 for a few more weeks as this is our busy season).

Here is a sample of the code in one of the gridviews (used similar logic in the other grids):

Hi,

I created ColumnGroups for my GridView Columns and found out that Grid lines for ColumnGroup and Columns are not lining up and doesn't look good in UI. Is there any workaround for this? I am attaching a

1) magnified snapshot to illustrate the difference in lines (gridheaderwithcolumngroup_snapshot.png)

I have a sample project as well to show this but couldn't upload it because I am not allowed to attach anything else to this thread apart from image files.

Thanks,
Sandeep

Hi Guys,

I am very interested with Data virtualization, so I am refractoring my customer's old WPF project. Everything goes well but I encountered one critical issue when I use combobox with VirtualQueryableCollectionView  as GridViewDataColumn.CellEditTemplate.  Let me show it:

1. I make below collection binding to my combobox 3. when I change inner combobox's selection, my viewmodel BuyingOrganization can be changed. From surface,
 it work right.   But if I take this cell out of Edit mode, the Null will be set to this BuyingOrganization. 

I debug it, the VirtualQueryableCollectionView will call MoveCurrentPosition to one null value.

How should I do? Can you give me some tips?

Thanks & Regards

Dely

I have pdf file preview.pdf and it cannot be displayed in viewer. I use controls 2013 Q1

UPDATE: it works in 2013 Q1 SP1

I've got a GridView control on a window, that has some columns in it. One of the columns is wider than we need it to be. The values in that column are nearly always single digits. (There's only 4 records out of tens of thousands, in our database, which is either 10 or 11, and 11 is the highest any of our records go.) Anyway, in looking at the properties of the GridViewDataColumn I was that the MinWidth was 20. I set it to 3, but that didn't help. In fact, it didn't even look as though I'd changed the width at all. So, how do I get it to be narrower than it currently is displayed at? (The column I'm trying to narrow is the one associated with the CaseNumber data.) Here's the XAML:

Hi,

I am adding RadPanes dynamically to RadPaneGroups in a RadDocking control. The RadPanes have a customer header datatemplate that contains a button to close it. I get the following exception on calling RemoveFromParent() on the RadPane.

System.NullReferenceException was caught
  HResult=-2147467261
  Message=Object reference not set to an instance of an object.
  Source=Telerik.Windows.Controls.Navigation
  StackTrace:
       at Telerik.Windows.Controls.Primitives.TabStripPanel.<>c__DisplayClass14.<MeasureOverride>b__7(UIElement item)
       at System.Linq.Enumerable.WhereSelectListIterator`2.MoveNext()
       at System.Linq.Enumerable.Max(IEnumerable`1 source)
       at Telerik.Windows.Controls.Primitives.TabStripPanel.<>c__DisplayClass14.<MeasureOverride>b__6(Double total, List`1 next)
       at System.Linq.Enumerable.Aggregate[TSource,TAccumulate](IEnumerable`1 source, TAccumulate seed, Func`3 func)
       at Telerik.Windows.Controls.Primitives.TabStripPanel.MeasureOverride(Size availableSize)
       at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
       at System.Windows.UIElement.Measure(Size availableSize)
       at System.Windows.ContextLayoutManager.UpdateLayout()
       at Telerik.Windows.Controls.RadPane.OnDocumentHostTemplateChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e)
       at System.Windows.DependencyObject.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
       at System.Windows.FrameworkElement.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
       at System.Windows.DependencyObject.NotifyPropertyChange(DependencyPropertyChangedEventArgs args)
       at System.Windows.DependencyObject.UpdateEffectiveValue(EntryIndex entryIndex, DependencyProperty dp, PropertyMetadata metadata, EffectiveValueEntry oldEntry, EffectiveValueEntry& newEntry, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType)
       at System.Windows.DependencyObject.InvalidateProperty(DependencyProperty dp, Boolean preserveCurrentValue)
       at System.Windows.StyleHelper.InvalidateContainerDependents(DependencyObject container, FrugalStructList`1& exclusionContainerDependents, FrugalStructList`1& oldContainerDependents, FrugalStructList`1& newContainerDependents)
       at System.Windows.StyleHelper.DoStyleInvalidations(FrameworkElement fe, FrameworkContentElement fce, Style oldStyle, Style newStyle)
       at System.Windows.StyleHelper.UpdateStyleCache(FrameworkElement fe, FrameworkContentElement fce, Style oldStyle, Style newStyle, Style& styleCache)
       at System.Windows.FrameworkElement.OnStyleChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
       at System.Windows.DependencyObject.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
       at System.Windows.FrameworkElement.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
       at System.Windows.DependencyObject.NotifyPropertyChange(DependencyPropertyChangedEventArgs args)
       at System.Windows.DependencyObject.UpdateEffectiveValue(EntryIndex entryIndex, DependencyProperty dp, PropertyMetadata metadata, EffectiveValueEntry oldEntry, EffectiveValueEntry& newEntry, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType)
       at System.Windows.DependencyObject.InvalidateProperty(DependencyProperty dp, Boolean preserveCurrentValue)
       at System.Windows.FrameworkElement.UpdateStyleProperty()
       at System.Windows.TreeWalkHelper.InvalidateOnTreeChange(FrameworkElement fe, FrameworkContentElement fce, DependencyObject parent, Boolean isAddOperation)
       at System.Windows.FrameworkElement.OnVisualParentChanged(DependencyObject oldParent)
       at System.Windows.Media.Visual.FireOnVisualParentChanged(DependencyObject oldParent)
       at System.Windows.Media.Visual.RemoveVisualChild(Visual child)
       at System.Windows.Media.VisualCollection.RemoveRange(Int32 index, Int32 count)
       at System.Windows.Controls.UIElementCollection.RemoveRangeInternal(Int32 index, Int32 count)
       at System.Windows.Controls.Panel.OnItemsChangedInternal(Object sender, ItemsChangedEventArgs args)
       at System.Windows.Controls.Panel.OnItemsChanged(Object sender, ItemsChangedEventArgs args)
       at System.Windows.Controls.ItemContainerGenerator.OnItemRemoved(Object item, Int32 itemIndex)
       at System.Windows.Controls.ItemContainerGenerator.OnCollectionChanged(Object sender, NotifyCollectionChangedEventArgs args)
       at System.Windows.WeakEventManager.ListenerList`1.DeliverEvent(Object sender, EventArgs e, Type managerType)
       at System.Windows.WeakEventManager.DeliverEventToList(Object sender, EventArgs args, ListenerList list)
       at System.Windows.WeakEventManager.DeliverEvent(Object sender, EventArgs args)
       at System.Collections.Specialized.NotifyCollectionChangedEventHandler.Invoke(Object sender, NotifyCollectionChangedEventArgs e)
       at System.Windows.Data.CollectionView.OnCollectionChanged(NotifyCollectionChangedEventArgs args)
       at System.Windows.WeakEventManager.ListenerList`1.DeliverEvent(Object sender, EventArgs e, Type managerType)
       at System.Windows.WeakEventManager.DeliverEventToList(Object sender, EventArgs args, ListenerList list)
       at System.Windows.WeakEventManager.DeliverEvent(Object sender, EventArgs args)
       at System.Windows.Data.CollectionView.OnCollectionChanged(NotifyCollectionChangedEventArgs args)
       at MS.Internal.Controls.InnerItemCollectionView._RemoveAt(Int32 index, Int32 indexR, Object item)
       at System.Windows.Controls.ItemCollection.Remove(Object removeItem)
       at Telerik.Windows.Controls.RadPaneGroup.RemovePane(RadPane pane)
       at Telerik.Windows.Controls.RadPane.RemoveFromParent()

Even calling RemovePane on the RadPaneGroup raises the exception "Object reference not set to an instance of an object."

I am using the version 2013.1.220.45. Any idea what can cause the above exception?

Thank you,

Gajan

Hi,
sorry for poor english ;-)
I'm creating a data logging software that gets temperature,pressure,... from external hardware. An IObservableCollection is used  to store new data i want to visualize them in your amazing chart tool. the logging may take days and data points adds every second.
my problem is HorizontalAxis labels, I have already used another 3rd party component ( C1.WPF.Chart ). it has a property named : "IsTime" and when enabled and bound to a TimeSpan data label formatting changed as logging continued ( seconds,minutes,hours,...). Now I'm evaluating your control and pretty sure RadChart is capable of doing the same thing much better. would please tell me how?
mentioned component looks like this :

thanks in advance

How could I make visible groupings of Tiles with the RadList?  Maybe a thin outline around them and/or a Label. 

Hi Guys

I am currently trying out your radGridView for its hierarchical ability with the hope to purchase if I can get the following to work:

I need to be able to create the hierarchical gridview, with the child being bound to a collection of the original collection. To explain...

I have the following 3 simple classes

public class Task
{
string Name;
string Description
}

public class Phase
{
string Name;
string Description;
ObservableCollection<Task> Tasks
}

public class Project
{
string Name;
string Description
ObservableCollection<Phase> Phases
}

As you can see above, Tasks is a collection within Phase and Phases is a collection within Project.
Now what I want to do with displaying this is Project to be the "root"/"parent", the collection of Phases as the "child" to Project and the collection of Tasks as the "child" to Phases.

Is this possible with the RadGridView? If so, could you PLEASE point me in the right direction to achieve this layout with the RadGridView?

If you need any more info please ask!

Thanking you in advance!

Hello.
1) I have WPF application with RadDiagram and RadDiagramToolbox components.
2) I create GalleryCollection with my owner shapes:

This is GetShape method:

 3) My shapes I get from database. There are samples of my shapes:

-Shape1:

+Shape2:

+Shape3:

-Shape4:

+Shape5:

-Shaep6:

4) Then I binding GalleryCollection:

5) When I run my application it's OK. My shapes showing into RadDiagramToolbox. When I try drug&drop Shape2 or Shape3 or Shape5 it's OK too. 
But when I try drug Shape1 or Shape4 or Shape6 I get exception (I get exception when Path tag has CombinedGeometry tag):

Object reference not set to an instance of an object.

Do you have any ideas?